大名鼎鼎的网络瑞士军刀NC的源代码！功能简介如下：

Basic Features



* Outbound or inbound connections, TCP or UDP, to or from any ports

* Full DNS forward/reverse checking, with appropriate warnings

* Ability to use any local source port

* Ability to use any locally-configured network source address

* Built-in port-scanning capabilities, with randomizer

* Can read command line arguments from standard inputb

* Slow-send mode, one line every N seconds

* Hex dump of transmitted and received data

* Ability to let another program service established

connections

* Telnet-options responder